Ridutor of direct pressure ISO 4401-02 (CEP R02) The PZM2 valve is a three-way pressure reducer with direct action, in a modular version. PZM2 is a normally open valve. The hydraulic fluid flows freely in the pressure duct. When the incoming pressure exceeds the value set with the adjustment screw, it sends the surplus unloaded. It is used to reduce the pressure on secondary circuit branches ensuring the stability of the pressure regulated also when varying the flow that crosses the valve. The three -way structure protects the secondary circuit from overpressure, allowing the reverse flow from the actuator to the exhaust line to the tank.